Identification of grass carp haemorrhage virus as a new genogroup of aquareovirus

Three aquareovirus strains isolated from grass carp (Ctenopharyngodon idell us), geoduck clams (Panope abrupta) and herring (Clupea harengus) in North America and Asia were examined by RNA-RNA blot hybridization to determine t heir genogroup, The isolates from clams and herring were identified as memb ers of genogroup A, but the isolate from grass carp did not hybridize to an y of the known genogroups, suggesting that this virus probably represents a new, seventh genogroup.